Patents by Inventor Yat Keung William Yuen

Yat Keung William Yuen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7641629
    Abstract: An electric breast pump is disclosed as including a hood to be fitted over a breast of a user, a chamber in fluid communication with the hood member via a one-way valve, a pump motor operatively associated with a pump diaphragm movable to draw air from the hood into the chamber via the valve, in which the chamber has an opening and a lid which is operatively associated with the motor, in which the lid is movable between a first position to close the opening and a second position in which the opening is open, and in which the lid is at the first position when the motor is in operation and is at the second position when the motor is not in operation. The breast pump also includes sensors for detecting the passing of milk, and a microcontroller for calculating the rate of flow of milk on the basis of data received from the sensors.
    Type: Grant
    Filed: April 12, 2004
    Date of Patent: January 5, 2010
    Assignee: Sea Profit (Hong Kong) Limited
    Inventor: Yat Keung William Yuen
  • Publication number: 20040173623
    Abstract: There is disclosed a flow restrictor for a liquid, e.g. water, the restrictor having an upper end, an opposite lower end, and a channel with an inlet at the first end and an outlet at the second end, the path allowing the passing of the liquid from the inlet to the outlet, and the path has a first portion and a second portion, in which the first portion is upstream of the second portion, and the distance between the first portion and the second end is shorter than the distance between the second portion and the second end. A drinking cup incorporating such a flow restrictor is also disclosed.
    Type: Application
    Filed: March 7, 2003
    Publication date: September 9, 2004
    Inventor: Yat Keung William Yuen